CN221647524U - A non-eccentric transmission RV reducer - Google Patents

Abstract

The utility model discloses a non-eccentric transmission RV reducer, comprising: an input shaft, which is connected to the mechanical transmission motor shaft, and the input shaft is an integral input part; a gear frame integral part, which is concentrically sleeved outside the input shaft, and is a ring frame structure, and the inner wall surface of the gear frame integral part is equidistantly provided with tooth blocks; a reduction gear, whose outer wall tooth blocks are meshed and connected with the inner teeth of the gear frame integral part and the tooth block at one end of the input shaft. The non-eccentric transmission RV reducer is assembled concentrically with the input shaft through the gear frame integral part and the gear housing integral part, and is matched and operated jointly through the auxiliary bearing and the outer bearing, so that the internal structure constitutes a combination of two or more eccentric circles evenly distributed. Compared with the traditional cycloid reducer, the eccentric shaft and the eccentric bearing that affects the service life of the original RV reducer are omitted, and two sets of overlapping and independently rotatable movable tooth sleeve combinations without interfering with each other are formed, which reduces the difficulty of assembly.

Description

A non-eccentric transmission RV reducer

Technical Field

The utility model relates to the technical field of reducers, in particular to a non-eccentric transmission RV reducer.

Background Art

The RV reducer consists of a planetary gear reducer as the front stage and a cycloid pinwheel reducer as the rear stage. The RV reducer has a compact structure, a large transmission ratio, and a transmission mechanism with a self-locking function under certain conditions. It is one of the most commonly used reducers with low vibration, low noise, and low energy consumption.

The RV reducer currently in use has a rear-stage secondary transmission combined with a planetary gear transmission and a cycloidal gear transmission. However, in the second-stage transmission, two sets of cycloidal wheels are required to achieve balanced operation through the setting of eccentric shafts and eccentric bearings, which increases the difficulty of overall assembly. In addition, since the manufacturing difficulty of the additional pin gear is too great, the accuracy of the existing finished RV reducer is difficult to meet the expected requirements, and the manufacturing cost is high and the volume is relatively large.

Utility Model Content

The purpose of the utility model is to provide an RV reducer without eccentric transmission, so as to solve the problems proposed in the above background technology that in the second-stage transmission, two sets of cycloid wheels are required to achieve balanced operation through the arrangement of eccentric shafts and eccentric bearings, which increases the difficulty of overall assembly, and because the manufacturing difficulty of the additional pin gear is too great, the accuracy of the existing finished RV reducer is difficult to meet the expected requirements, and the manufacturing cost is high and the volume is relatively large.

To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an eccentric-free transmission RV reducer, comprising an input shaft, which is connected to the mechanical transmission motor shaft, and the input shaft is an integral input component;

The gear frame integral part is concentrically sleeved outside the input shaft and is an annular frame structure, and the inner wall surface of the gear frame integral part is equidistantly provided with gear blocks;

One end of the input shaft is provided with a gear structure, and the cross section of the input shaft is a convex tube structure. The input shaft passes through the inside of the output disc and

The planetary reduction assembly is arranged concentrically with the output end of the input shaft to reduce the speed of the output transmission of the input shaft;

The auxiliary bearing is concentrically sleeved on the input shaft, one side of the auxiliary bearing abuts against a surface of the hole retaining spring, and the surface of the auxiliary bearing abutting against the hole retaining spring contacts the surface of the output disk, and the output disk is equidistantly connected with internal bolts, the other side of the auxiliary bearing abuts against the surface of the retaining ring, and one side of the retaining ring contacts

The movable tooth reduction assembly is arranged concentrically with the output end of the input shaft to maintain a smooth transmission with the input shaft;

The shock wave generator is penetrated by the input shaft, an outer bearing is arranged on one side of the outer wall of the shock wave generator, and a second hole retaining spring is installed on the surface of the outer bearing, and the shock wave generator is arranged in parallel with the output disk.

By adopting the above technical solution, a two-stage transmission reduction structure is provided for the internal transmission of the reducer, effectively maintaining the transmission stability.

Preferably, the planetary reduction assembly comprises:

The gear fixed shaft is installed in a circular shape with equal spacing inside the shock wave generator to reduce the speed of the input shaft transmission force;

The shaft retaining spring is sleeved on one end of the outer wall of the gear fixed shaft to limit the working range of the gear fixed shaft;

Two inner bearings are provided, and both inner bearings are sleeved on one side of the gear fixed shaft and abut against the surface of one side of the shaft retaining spring;

The retaining ring is installed between the two inner bearings to maintain the gap between the two inner bearings;

The reduction gear is installed on the outer wall surfaces of the two inner bearings, and the reduction gear and the gear fixing shaft are arranged in a concentric circle.

By adopting the above technical solution, the internal reduction gear is kept in a stable rotation state as the gear fixing shaft and the shock wave generator are linked.

Preferably, the gear fixing shaft is provided with a protrusion structure between the inner bearing and the shock wave generator, and the gear fixing shaft is arranged in a ring shape with equal distances around the center of the shock wave generator.

The above technical solution is adopted to effectively improve the stable linkage processing of the gear fixing shaft and the inner bearing.

Preferably, the outer wall gear block of the reduction gear is meshingly connected with the inner wall gear located on the gear frame integral part and the gear block arranged at one end of the input shaft, and the gear frame integral part and the input shaft are arranged concentrically.

By adopting the above technical solution, the gears arranged on the inner wall surface of the reduction gear and the gear rack integral part form a planetary gear transmission structure.

Preferably, one end of the inner bolt penetrates one side of the gear frame integral part, and the outer wall surface of the gear frame integral part abuts against the inner wall surface of the auxiliary bearing, and one side of the gear frame integral part is connected to the outer wall surface of the outer bearing.

By adopting the above technical solution, a stable transmission environment is provided for the two internal transmission components through the gear frame integrated part.

Preferably, the movable tooth reduction assembly comprises:

The movable tooth piece is arranged in a ring shape with a double-layer structure at equal intervals, and the double-layer movable tooth piece is installed on the movable tooth pin arranged inside the gear frame integral part to provide assistance for the shock wave linkage;

The gear housing integrated part is sleeved on the outside of the gear frame integrated part and contacts the outer layer of the double-layer structure of the movable tooth part.

By adopting the above technical solution, a double-layer structure is formed by movable teeth to realize reciprocating operation and realize joint operation between two reduction components.

Preferably, one end of the gear housing integrated part is connected and installed to the outer wall surface of the auxiliary bearing, and the gear housing integrated part and the gear frame integrated part are arranged in concentric circles.

By adopting the above technical solution, the gear housing integrated part and the auxiliary bearing are linked to each other to maintain the overall rotation stable.

Compared with the prior art, the utility model has the following beneficial effects: the non-eccentric transmission RV reducer:

1. The gear frame and gear housing are assembled concentrically with the input shaft, and the auxiliary bearing and the outer bearing are matched and operated together, so that the internal structure forms a combination of two or more eccentric circles evenly distributed. Compared with the traditional cycloid reducer, the eccentric shaft and the eccentric bearing that affects the life of the original RV reducer are omitted, forming two sets of overlapping and independently rotatable movable gear sleeves without interfering with each other, reducing the difficulty of assembly;

2. When the gear on the inner wall of the gear rack is working, the motion is transmitted to the gear fixed shaft through the reduction gear. The gear fixed shaft rotates around the center to drive the shock wave to perform synchronous reduction rotation. The movable tooth part tangent to the shock wave performs radial reciprocating movement to realize the joint reduction operation. The setting of the planetary reduction assembly further improves the stable transmission inside the reducer.

3. When the movable teeth are working, their outer layer is tangent to the tooth profile of the gear housing integral part. Since the number of movable teeth is not equal to the number of teeth on the gear housing integral part, when the shock wave generator rotates, some movable teeth mesh with the gear housing integral part teeth to achieve a larger transmission ratio deceleration. Among them, the movable tooth reduction assembly allows the internal movable teeth to replace the traditional movable teeth, which can realize a pure rolling mode between the movable teeth and the gear housing integral part. Compared with the traditional cycloid reducer, it eliminates the influence of the rotation of the eccentric shaft on the life of the original RV reducer.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall split three-dimensional structure of the utility model;

FIG2 is a schematic diagram of the overall external three-dimensional structure of the utility model;

FIG3 is a schematic diagram of the overall internal cross-sectional structure of the utility model;

FIG4 is a schematic diagram of a side cross-sectional three-dimensional structure of the movable tooth member and the gear housing integrated member installed in the utility model;

FIG5 is a schematic diagram of the overall internal side sectional structure of the utility model;

FIG. 6 is an enlarged structural schematic diagram of point A in FIG. 4 of the present invention.

In the figure: 1. Input shaft; 2. Gear fixing shaft; 3. Shaft retaining spring; 4. Inner bearing; 5. Retaining ring; 6. Inner bolt; 7. Output disk; 8. Hole retaining spring 1; 9. Auxiliary bearing; 10. Retaining ring; 11. Gear frame integrated part; 12. Reduction gear; 13. Movable tooth part; 14. Gear housing integrated part; 15. Outer bearing; 16. Hole retaining spring 2; 17. Shock wave generator.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Please refer to Figures 1-6. The utility model provides a technical solution: a non-eccentric transmission RV reducer, including an input shaft 1, a gear fixing shaft 2, a shaft retaining spring 3, an inner bearing 4, a retaining ring 5, an inner bolt 6, an output disc 7, a hole retaining spring 8, an auxiliary bearing 9, a retaining ring 10, a gear frame integrated part 11, a reduction gear 12, a movable tooth part 13, a gear housing integrated part 14, an outer bearing 15, a hole retaining spring 2 16 and a shock wave device 17;

Among them, the input shaft 1 is connected to the mechanical transmission motor shaft, and the input shaft 1 is an integral input part;

The gear frame integral part 11 is concentrically sleeved outside the input shaft 1 and is an annular frame structure, and gear blocks are equidistantly arranged on the inner wall surface of the gear frame integral part 11;

One end of the input shaft 1 is set as a gear structure, and the cross section of the input shaft 1 is a convex tube structure. The input shaft 1 passes through the inside of the output disc 7 and

The planetary reduction assembly is arranged concentrically with the output end of the input shaft 1 to reduce the output transmission of the input shaft 1;

The auxiliary bearing 9 is concentrically sleeved on the input shaft 1, one side of the auxiliary bearing 9 abuts against the surface of the hole retaining spring 8, and the surface of the auxiliary bearing 9 abutting against the hole retaining spring 8 contacts the surface of the output disc 7, and the output disc 7 is equidistantly connected with inner bolts 6 inside, and the other side of the auxiliary bearing 9 abuts against the surface of the retaining ring 10, and one side of the retaining ring 10 contacts with

The movable tooth reduction assembly is arranged concentrically with the output end of the input shaft 1 to maintain a smooth transmission with the input shaft 1;

The shock wave generator 17 is penetrated by the input shaft 1 , an outer bearing 15 is arranged on one side of the outer wall of the shock wave generator 17 , and a hole retaining spring 16 is installed on the surface of the outer bearing 15 . The shock wave generator 17 is arranged parallel to the output disk 7 .

As shown in Figures 1-4 of the accompanying drawings of the specification, when in use, the input shaft 1 is connected to the output shaft of the machine, so that the input shaft 1 passes through the shock wave device 17 and the internal opening of the output disk 7 to rotate, and the gear structure arranged at one end of the input shaft 1 rotates in conjunction with the planetary reduction assembly to perform a first-stage reduction operation. As shown in Figures 2-4, the inner bolt 6 arranged inside the output disk 7 is used to fix the installation position of the output disk 7. The auxiliary bearing 9 located on the outer wall of the output disk 7 is used to buffer the vibration generated by the drive of the input shaft 1 and other floating environments. As shown in Figures 2-4, the gear structure arranged at one end of the input shaft 1 and the planetary reduction assembly are used to rotate in conjunction with the planetary reduction assembly to perform a first-stage reduction operation. The retaining ring 10 on the side is in contact with the movable tooth reduction assembly, the auxiliary bearing 9 is limited by the retaining spring 8 through the hole on the surface, and the outer bearing 15 arranged on the outer wall of the shock wave 17 works together with the retaining spring 16 for the hole, as shown in Figure 2-4, so as to maintain the transmission stability of the shock wave 17 during the deceleration operation, and the movable tooth reduction assembly and the planetary reduction assembly arranged on the inner side and the outer wall of the shock wave 17 work together to realize the combination of transmission deceleration, so that the whole has the advantages of large transmission ratio, small transmission backlash and high transmission efficiency, and its comprehensive characteristics are higher than those of the traditional RV reducer;

The planetary reduction assembly includes:

The gear fixing shaft 2 is installed in the shock wave generator 17 in an annular shape and at equal intervals, and is used to reduce the speed of the input shaft 1 transmission force. The gear fixing shaft 2 is provided with a protrusion structure between the inner bearing 4 and the shock wave generator 17, and the gear fixing shaft 2 is arranged in an annular shape and at equal intervals with the center of the shock wave generator 17 as the center.

The shaft retaining spring 3 is sleeved on one end of the outer wall of the gear fixing shaft 2 to limit the working range of the gear fixing shaft 2;

Two inner bearings 4 are provided, and both inner bearings 4 are sleeved on one side of the gear fixing shaft 2 and abut against the surface of one side of the shaft retaining spring 3;

The retaining ring 5 is installed between the two inner bearings 4 to maintain the gap between the two inner bearings 4;

The reduction gear 12 is mounted on the outer wall surfaces of the two inner bearings 4, and the reduction gear 12 is concentrically arranged with the gear fixing shaft 2, the outer wall tooth block of the reduction gear 12 is located at the inner wall gear of the gear frame integral part 11 and meshes with the tooth block arranged at one end of the input shaft 1, and the gear frame integral part 11 is concentrically arranged with the input shaft 1, one side of the inner part of the gear frame integral part 11 is penetrated by one end of the inner bolt 6, and the outer wall surface of the gear frame integral part 11 is against the inner wall surface of the auxiliary bearing 9, and one side of the gear frame integral part 11 is connected to the outer wall surface of the outer bearing 15;

As shown in Figures 1-6 of the accompanying drawings of the specification, the gear fixing shaft 2 is arranged in a circular shape with the center of the shock wave generator 17 as the center, as shown in Figures 2-5, wherein the number of the gear fixing shafts 2 is increased or decreased according to the need for transmission deceleration, and the shaft retaining spring 3 arranged on the surface of the gear fixing shaft 2 is located on the surface of the inner bearing 4 of the outer layer to limit the position, and the retaining ring 5 connected to the inner wall surface of the reduction gear 12 is located between the two inner bearings 4, as shown in Figure 4, to keep the spacing between the two inner bearings 4 consistent during the rotation operation, and the auxiliary reduction gear 12 realizes transmission deceleration, and the reduction gear 1 is passed through the reduction gear 1 2 is located inside the inner wall gear of the gear frame integral part 11 to form a planetary gear transmission, as shown in FIG2, wherein the inner wall gear of the gear frame integral part 11 and the input shaft 1 provide planetary gear motion for the reduction gear 12. When the input shaft 1 rotates, the input shaft 1 transfers the motion to the reduction gear 12. As the reduction gear 12 rotates around the center, the shock wave generator 17 is driven to perform synchronous reduction rotation through the gear fixing shaft 2, so that the shock wave generator 17 moves radially back and forth toward the movable tooth reduction assembly, thereby realizing a combined reduction, as shown in FIG2-5, and reducing the eccentricity occurring during the rotation process;

The movable tooth reduction assembly includes:

The movable tooth member 13 is annular and equidistantly arranged with a double-layer structure, and the double-layer movable tooth member 13 is installed on the movable tooth pin arranged inside the gear frame integral member 11 to provide assistance for the linkage of the shock wave generator 17;

The gear housing integrated part 14 is sleeved on the outside of the gear frame integrated part 11 and contacts the outer layer of the double-layer structure of the movable tooth part 13. One end of the gear housing integrated part 14 is connected and installed with the outer wall surface of the auxiliary bearing 9, and the gear housing integrated part 14 and the gear frame integrated part 11 are arranged concentrically;

As shown in Figures 1-6 of the accompanying drawings of the specification, the gear housing integral part 14 is sleeved on the outside of the shock wave generator 17 and the gear frame integral part 11 to form a concentric circle arrangement. Since the movable tooth part 13 forms a double-layer structure, as shown in Figures 2-6, the movable tooth part 13 is installed inside the gear frame integral part 11, as shown in Figure 3, the number of movable tooth parts 13 is not equal to the number of teeth in the grooves set on the inner wall surface of the gear housing integral part 14. When the shock wave generator 17 rotates, the movable tooth part in the movable tooth part 13 meshes with the gear teeth of the gear housing integral part 14. This meshing is equivalent to a small tooth difference transmission, which constitutes a larger transmission ratio. The reduction mechanism enables the combination of the movable tooth reduction assembly and the planetary reduction assembly to achieve highly stable and non-eccentric reduction activity. Since the movable tooth part 13 adopts two overlapping groups, the cylindrical structure of the movable tooth part 13 realizes a nested combination that can rotate independently without interfering with each other. The inner movable teeth are in contact with the shock wave generator 17, and the outer movable teeth are in contact with the gear housing integral part 14. The movable tooth part 13 is arranged inside the movable tooth pin of the gear frame integral part 11, as shown in Figure 3, which is a clearance fit and can rotate, wherein the two ends of the movable tooth pin of the gear frame integral part 11 are tightly connected with the movable tooth fixing sleeve.

Working principle: When the non-eccentric transmission RV reducer is used, the input shaft 1 is connected to the output end of the motor. As the input shaft 1 rotates, the gear at one end of the input shaft 1 pushes the reduction gear 12 located inside the gear frame integral part 11 to mesh with the inner wall surface of the gear provided therein, so that the gear frame integral part 11 and the reduction gear 12 form a planetary gear transmission. The gear frame integral part 11 is linked with the shock wave generator 17 through the movable tooth part 13. When the gear structure inside the gear frame integral part 11 works, the motion is transmitted to the gear fixed shaft 2 through the reduction gear 12. The gear fixed shaft 2 rotates around the center to drive the shock wave generator 17 to perform synchronous reduction rotation and The inner layer of the movable tooth 13 makes radial reciprocating movements. When the movable tooth 13 is working, its outer layer is tangent to the inner cycloid wheel tooth profile. The number of movable teeth 13 is not equal to the number of teeth of the gear housing integrated part 14. When the shock wave generator 17 rotates, some movable teeth 13 mesh with the gear housing integrated part 14 to realize transmission with small tooth difference. It is a reduction mechanism with a larger transmission ratio. It is a combination of planetary gear transmission reduction composed of the gear frame integrated part 11 and the reduction gear 12 and the two-stage combined transmission reduction composed of the movable tooth 13 and the shock wave generator 17, so that the overall transmission ratio is large and the transmission backlash is small, thereby increasing the overall practicality.

Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. A non-eccentric transmission RV reducer, comprising: An input shaft (1) is connected to the shaft of the mechanical transmission motor, and the input shaft (1) is an integral input component; The gear frame integrated part (11) is concentrically sleeved outside the input shaft (1) and is an annular frame structure, and gear blocks are equidistantly arranged on the inner wall surface of the frame of the gear frame integrated part (11); The invention is characterized in that: one end of the input shaft (1) is provided with a gear structure, and the cross section of the input shaft (1) is a convex tube structure, and the input shaft (1) passes through the inside of the output disc (7) and A planetary reduction assembly is arranged concentrically with the output end of the input shaft (1) to reduce the speed of the output transmission of the input shaft (1); An auxiliary bearing (9) is concentrically sleeved on the input shaft (1), one side of the auxiliary bearing (9) abuts against the surface of the hole retaining spring (8), and the surface of the auxiliary bearing (9) abutting against the hole retaining spring (8) contacts the surface of the output disc (7), and the output disc (7) is equidistantly connected with internal bolts (6), the other side of the auxiliary bearing (9) abuts against the surface of the retaining ring (10), and one side of the retaining ring (10) contacts with a movable tooth reduction assembly, and is concentrically arranged with the output end of the input shaft (1) to maintain a stable transmission with the input shaft (1); A shock wave generator (17) is penetrated by the input shaft (1), an outer bearing (15) is arranged on one side of the outer wall of the shock wave generator (17), and a second hole retaining spring (16) is installed on the surface of the outer bearing (15), and the shock wave generator (17) is arranged in parallel with the output disk (7). 2. The non-eccentric transmission RV reducer according to claim 1, characterized in that: the planetary reduction assembly comprises: The gear fixing shaft (2) is installed in an annular shape and equidistantly inside the shock wave generator (17) to reduce the speed of the input shaft (1) transmission force; A shaft retaining spring (3) is sleeved on one end of the outer wall surface of the gear fixing shaft (2) to limit the working range of the gear fixing shaft (2); Two inner bearings (4) are provided, and both inner bearings (4) are sleeved on one side of the gear fixing shaft (2) and abut against the surface of one side of the shaft retaining spring (3); A retaining ring (5) is installed between the two inner bearings (4) to maintain a gap between the two inner bearings (4); The reduction gear (12) is mounted on the outer wall surfaces of the two inner bearings (4), and the reduction gear (12) and the gear fixing shaft (2) are arranged concentrically. 3. According to claim 2, a non-eccentric transmission RV reducer is characterized in that: the gear fixing shaft (2) is provided with a protrusion structure between the inner bearing (4) and the shock wave generator (17), and the gear fixing shaft (2) is arranged in a ring-shaped and equidistant manner with the center of the shock wave generator (17) as the center. 4. A non-eccentric transmission RV reducer according to claim 2, characterized in that: the outer wall tooth block of the reduction gear (12) is meshingly connected with the inner wall gear located on the gear frame integral part (11) and the tooth block arranged at one end of the input shaft (1), and the gear frame integral part (11) and the input shaft (1) are arranged concentrically. 5. A non-eccentric transmission RV reducer according to claim 4, characterized in that: one side of the interior of the gear frame integral part (11) is penetrated by one end of the inner bolt (6), and the outer wall surface of the gear frame integral part (11) is abutted against the inner wall surface of the auxiliary bearing (9), and one side of the gear frame integral part (11) is connected to the outer wall surface of the external bearing (15). 6. The non-eccentric transmission RV reducer according to claim 1, characterized in that: the movable tooth reduction assembly comprises: The movable tooth piece (13) is annularly arranged with a double-layer structure at equal intervals, and the double-layer movable tooth piece (13) is installed on a movable tooth pin arranged inside the gear frame integral piece (11), providing assistance for the linkage of the shock wave generator (17); The gear housing integrated part (14) is sleeved on the outside of the gear frame integrated part (11) and contacts the outer layer of the double-layer structure of the movable tooth part (13). 7. A non-eccentric transmission RV reducer according to claim 6, characterized in that one end of the gear housing integrated part (14) is connected and installed with the outer wall surface of the auxiliary bearing (9), and the gear housing integrated part (14) and the gear frame integrated part (11) are arranged in concentric circles.